#! /bin/zsh

# We use zsh here to support floats (not supported in bash)

# This script produces the .dsf files for the runs from `build_LiebLin_catalogue_k_fixed`
# runs which achieved the required sumrule saturation.

if [[ $# -ne 4 ]]; then
    echo "Arguments needed: whichDSF, kBT, target_sumrule, width."
    exit 1
fi

if [[ $1 != 'd' && $1 != 'g' && $1 != 'o' ]]; then
    echo "Only the d, g and o scanning options are implemented."
    exit 1
fi

if [[ $2 -lt 0 ]]; then
    echo "Temperature kBT must be > 0."
    exit 1
fi

if [[ $3 -lt 0 || $3 -gt 1 ]]; then
    echo "Requirement: 0 < target_sumrule < 1."
    exit 1
fi

if [[ $4 -lt 0 ]]; then
    echo "width must be > 0."
    exit 1
fi

whichDSF=$1
kBT=$2
target_sumrule=$3
width=$4

correlator='rho-rho'
if [[ $whichDSF == 'o' ]]; then
    correlator='psidag-psi'
elif [[ $whichDSF == 'g' ]]; then
    correlator='psi-psidag'
fi

clist=(1024 512 256 128 64 32 16 8 4 2 1 0.5 0.25 0.125 0.0625 0.03125 0.015625)

basedir="$(pwd)"


for c in $clist
do
    for nk in {1..16}
    do
	# ommin is set to zero for all
	ommin=0
	# ommax is set to about 2x the Tonks-Girardeau dispersion at this momentum:
	# w_TG = k^2 + 2\pi n |k|  with k=2pi*iK/L and iK=nk*N/8, so (with N=L) k=pi/4 nk and
	# w_TG = pi^2/16 nk^2 + pi^2/2 nk = pi^2 nk (nk/16 + 1/2)
	# We take pi^2 -> 8 for convenience, so 2*w_TG is about
	ommax=$(($nk*($nk + 8)))
	# Number of points:
	Nom=1000
	echo 'Starting computation of DSFs for c =' $c', kfact = '$nk
	dir='Lieb-Liniger/'$correlator'/T_'$kBT'/c_fixed/c_'$c'/k_fixed/k_'${(l:2::0:)nk}'kFo4/sr_'$target_sumrule'/store/data'
	cd $dir
	for datadir in *
	do
	    cd $datadir
	    N=${datadir#"N_"}
	    iK=$(($nk * $N/8))
	    Smoothen_LiebLin_DSF_Scaled $whichDSF $c $N $N $iK $iK $kBT 0 $ommin $ommax $Nom $width
	    cd ..
	done
	cd $basedir
	echo ' Successfully computed DSFs for c =' $c', kfact = '$nk'\n'
    done
done